Vacuum cleaner brush



Feb. 2/1965 E. c. PRATT ETAL. 3,167,802

VACUUM CLEANER BRUSH Original Filed May 8, 1962 United States Patent 0 3 Claims. (Cl. 15--383) This application is a division of our prior application, Serial No. 193,112,` tiled May 8, 1962, on Vacuum Cleaner Device, now abandoned.

This invention relates to a brush construction for power cleaners, such as conventional vacuum or suction cleaners, and power iioor brushes.

It is a general object of the invention to provide a rotary brush construction wherein its bristles are arranged to provide an improved beating and brushing action.

The above and other objectsr will more fully appear from the following description in connection with the accompanying drawing, in which:

FG. 1 is a transverse vertical sectional view through the. head of a cleaner'in which the brush construction Ais incorporated;

t FIG. 2'is a bottom plan viewof the head of the cleaner with the brush shown therein. y

The device includes a iioor traversing head 4, which 'as shown and described in the aboveidentied application for patent, has a handle inthe form of a hollow wand,

ya motor to drive the brush and means lfor exhausting air j and dirt therefrom, these features not ,being lessential to the -inventionof the present'application are not lshown in.

the drawing or described withv any. particularityrherein.

The cleaner head 4 has a bottom plate '6 whichis suit-V ably and removably secured to head ofthe cleaner. Y l

The bottom plate 6 has an air inlet opening 10 which 'the 'upper portion 3 of the Y extends nearly across the bottom plate adjacent its for- `j'ward. edge. :The undersideiot thebottom plate 6 has fdoWnWardh/.Open air inlet grooves'12 which extend from fthe forward and widest portion of lthe bottom plate to the ends of the air inlet 10. f A

The forward bottom edge portion of the bottornplate to the forward edge of the transverselyextending air indrawing.

A E'LSZ Patented Feb. 2, 1%65 let 1i). The grooves 12 and 14 provide an air inlet flow path coextensive with the length of the air inlet 1t) and beyond its ends to the sides of the bottom plate 6 and the cleaner head 4.

Mounted in the cleaner head i is a'brush spindle 16 provided with axles 18 which are supported by self-centering bearings 2i). V

The brush spindle 16 is provided with groups of bristles 22, each group being composed of bristle tufts 24 which are arranged in the form of a V, as shown in the The apex of each V-shaped group 22 is disposed in the direction of rotation of the bruslrspindle 16. Furthermore, each bristle group 22 is positioned ahead or behind an adjacent group about the spindle 16. For example, if there .are three bristle groups 22, as shown, they would be positioned with their apexes 120 degrees apart about the spindle 16. This formation of bristles in each group, and their staggering relationship about the spindle, provides an effective beating as well as brushing action, yet the staggering `as described combines the beating action with smooth rotation.

1t will of course be understood that various changes can be made in the specic relationship of the bristles '6 is also-provided with a series of shell grooves 11i which l extend from ythe extreme forward edge of the bottom plate while maintaining their desired functional eiiect, and v without departing from the spirit of the invention.

We claim: i l. in a power cleaner, a floor traversing head including av hollow casing having an elongated air inlet across the bottornthereof, a rotary brush in said casing including a spindle With 'bristles extending therefrom, the bristles being in V-shaped groups, each group oi bristles extendving only part of the length of the spindle and having its end in staggered misalignment relative to the adjacent end et an adjacent group of bristles laround the spindle.

` 2. The structure in claim 1, and the leading bristles of one group lying adjacent the trailing bristles of an adjacent gro-up relative'tothev axis of said spindle. n

3. The structure in claim l, and the apex of each V- shapedgroup `of bristles being located in the lead of the `direction ci rotation et said spindle. f

References Citedhy the Examiner UNiTnn STATES PATENTS 1,624,247 4/27 Hoover 1 --1 15-*179 x WALTER A; sCnEanPrimary Ermittler.; 

1. IN A POWER CLEANER, A FLOOR TRANSVERSING HEAD INCLUDING A HOLLOW CASING HAVING AN ELONGATED AIR INLET ACROSS THE BOTTOM THEREOF, A ROTARY BRUSH IN SAID CASING INCLUDING A SPINDLE WITH BRISTLES EXTENDING THEREFROM, THE BRISTLES BEING IN V-SHAPED GROUPS, EACH GROUP OF BRISTLES EXTENDING ONLY PART OF THE LENGTH OF THE SPINDLE AND HAVING ITS END IN STAGGERED MISALIGNMENT RELATIVE TO THE ADJACENT END OF AN ADJACENT GROUP OF BRISTLES AROUND THE SPINDLE. 